Card-screen



W. J. ENGLISH. Gard Screen.

No. 233,221. Patented Oct. 12,1880.

Fig.2. Fig.5. NW

Fig.5. OZ v v v v @fi 1F WITNESSES: INVENTORI UNITED STATES PATENT OFFICE.

WILLIAM J. ENGLISH, OF OOHOES, NEW YORK.

CARD-SCREEN.

SPECIFICATION forming part of Letters Patent No. 233,221, dated October 12, 1880. Application filed November 25, 1878.

To all whom it may concern Be it known that I, WILLIAM J. ENGLISH, of Oohoes, in the county of Albany and State of New York, have invented certain new and useful Improvements in Oard-Screens and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The invention has reference to improvements in screens for carding-engines, such as are usually placed under the main cylinder, and is an improvement on Patent No.153,429, granted to me July 28, 1874.

The invention consists in an improved construction of the screen, whereby lighter bars are made use of than are employed in the above-mentioned patent, so as to cheapen the construction and allow of more air-spaces between the bars, all of which will be more fully set forth hereinafter.

Figure 1 is a perspective view of my improved card-screen, showing the two strengthening-strips. Fig. 2 is a sectional view of a portion of a screen pror'ided with U-shaped narrow bars formed of sheet metal, with a narrow rounded top surface. Fig. 3 is a sectional view of a portion of a card-screen, also made of sheet metal, forming narrow slats with a rounded head or tube strengthened by the insertion of a wire. Fig. 4 is a sectional view of a portion of a card-screen provided with bars similar to the bars shown in Fig. 2, the lower ends being contracted, so as to enlarge the outer end of the air-spaces and allow a free discharge of the impurities. Fig. 5 shows the same bars as those of Fig. 3, the strengthening-wire used in the first being omitted.

In the drawings, arepresents the rim of the card-screen; b, a perforated metal sheet placed at the licker-in end of the carding-engine to allow the accumulation of air drawn in by the carding-cylinder, to lessen the air-blast against the fiber passing from the 1icker-in to the cylinder. Y

(Z d are narrow bars of doubled-over or bent sheet metal, secured transversely in the rim a. These bars may be of the shape of an inverted U, as in Fig.2; or they may have a tubular head and contracted parallel ends, with or without an internal strengthening-rod, as shown, respectively, in Figs. 3 and 5; or their ends may be caused to approach each other, as in Fig. 4. In every case it is essential that the upper surface of these bars should be rounded in order to obtain the best results in discharging impurities, obtaining proper airspace, and cheapening the construction.

G O are metal strips, secured by soldering to the narrow bars d, so as to keep them in their proper positions.

Narrow bent sheet-metal bars, such as are shown, do not have the lateral strength to resist the air-pressure against their flat sides, and must be strengthened by such means as the strips 0 O, soldered to all the bars, or by short pieces soldered between the bars, so as to give them the desired rigidity.

All the bars can be readily soldered to the sides and the strips 0, and a firm and strong screen be secured, which gives more openings than my former patent screen, and therefore allows me to make these openings narrower, and thus prevent waste of fiber.

By my construction of bars, forming narrow slats, I am enabled to secure a large number of narrow air passages or spaces, which aggregate a large air-space.

Hcretofore such screens have been made with round rods, and also with triangular sheetmetal bars, the latter having flat upper surfaces; but I believe my mode of forming such bars of sheet metal with rounded upper surfaces is the most effectual method of obtaining the best results.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The within-described card-screen, provided with bars composed of bent sheet metal havin g rounded upper surfaces and depending unconnected ends, substantially as shown.

2. A card-screen constructed, as described, with narrow bent sheet-metal bars or slats, rims a'a, strips 0 c, and the perforated sheet b, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I have aflixed my signature in presence of two witnesses.

WM. J. ENGLISH.

Witnesses:

FRANK BROWN, J r., JULIUs SHAW. 

